package com.liu.reggie.controller;

import com.liu.reggie.common.R;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;

/**
 * @author liustart
 * @create 2022-07-26 23:02
 */
@RestController
@RequestMapping("/common")
public class CommonController {

    @Value("${reggie.path}")
    private String basePath;

    @PostMapping("/upload")
    public R<String> upload(MultipartFile file){
        String originalFilename = file.getOriginalFilename();
        String houzhui = originalFilename.substring(originalFilename.lastIndexOf("."));
        String fileName=UUID.randomUUID().toString()+houzhui;
        File file1 = new File(basePath);
        if (!file1.exists()){
            //目录不存在，需要创建
            file1.mkdirs();
        }
        try {
            file.transferTo(new File(basePath+fileName));
        } catch (IOException e) {
            e.printStackTrace();
        }
        return R.success(fileName);
    }

    @GetMapping("/download")
    public void downLoad(String name, HttpServletResponse response){
        try {
            FileInputStream fileInputStream = new FileInputStream(new File(basePath + name));
            ServletOutputStream outputStream = response.getOutputStream();
            response.setContentType("image/jpeg");
            byte[] bytes=new byte[1024];
            int len = 0;
            while ((len=fileInputStream.read(bytes))!=-1){
                outputStream.write(bytes,0,len);
                    outputStream.flush();
            }
            outputStream.close();
            fileInputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}
